Display screen or portion thereof with an animated graphical interface



FIG. 1 is a front view of a display screen or portion thereof with, an animated graphical interface showing a first image in a sequence showing my new design; and,

FIG. 2 is a second image thereof.

The broken lines (including lines that are medium-dashed, bold-dashed, and square-dotted), broken text, and broken graphics illustrate portions of the display screen or portion thereof with the animated graphical interface that form no part of the claimed design. The appearance of the animated images sequentially transitions between the images shown in FIG. 1 and FIG. 2. The process or period in which one image transitions to another forms no part of the claimed design. 

CLAIM I claim the ornamental design for a display screen or portion thereof with an animated graphical interface, as shown and described. 